Blue triangular pennant with white disk with 10 wavy lines throughout and
overall a blue anchor.
The disk size is 1/2 the hoist, the anchor height is 1/3 the hoist. The vertical
axis of the disk (and anchor) distance from the hoist is indicated as 28/75 of
hoist size.
This pennant was presumably used as signal on hydrographic ships in addition to
their regular ensign (weather that was the naval or merchant ensign or, I guess
not that often, one of the special ensigns).Source: Flaggenbuch, 1939Željko Heimer, 9 February 2003